21. Both isomeric levels are populated when produced directly. 22. In contrast to the isomeric thiazole, the two heteroatoms are in adjacent positions. 23. It is a colorless liquid is manufactured by the thermal dehydrogenation of isomeric diethylbenzenes. 24. Metastable isomeric transition is the only nuclear decay mode that approaches pure gamma emission. 25. Pseudouridylation is the isomerisation of the nucleoside uridine to the different isomeric form pseudouridine. 26. Several isomeric naphthoquinones are known, notably benzoquinone. 27. This isomeric form of hydrogen peroxide, oxywater, has not been synthesized experimentally. 28. It is one of two isomeric bromonaphthalenes, the other being 2-bromonaphthalene. 29. It is one of three isomeric benzenetriols. 30. It is a six-membered heterocyclic aromatic ring, one of several isomeric triazines.
